Intel 8080

From Conservapedia

The Intel 8080 was the first popular 8-bit microprocessor CPU. It was the successor to the 8008, which was the very first 8-bit microprocessor. It was succeeded by the 8085, and then by 16-bit processors. The Zilog Z-80 had the 8080 instruction set as a subset of its own instruction set.

Architecture

Data size = 8 bits

Address size = 16 bits

8-bit Registers: A, B, C, D, E, H, L

16-bit Registers: PC, SP

Six of the 8-bit registers could be used as 3 16-bit registers: BC, DE, HL. The HL pair was used for memory-indirect access. A (the accumulator) was the only register that supported arithmetic operations.